eclipse servlet简单的用户登录

最新推荐文章于 2024-07-01 03:28:33 发布

Martind

最新推荐文章于 2024-07-01 03:28:33 发布

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分类专栏： java web开发

本文链接：https://blog.youkuaiyun.com/Martind/article/details/74099306

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本文介绍了一个简单的Servlet登录示例，包括servlet程序实现、登录界面设计及web.xml配置。通过该示例，用户可以了解如何使用Servlet进行基本的身份验证。

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servlet程序

package test;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class first_servlet
 */
@WebServlet("/first_servlet")
public class first_servlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public first_servlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		String name=request.getParameter("inputname");
		String pwd=request.getParameter("inputpwd");
		if(name!=null&&name.equals("martin")) {
			response.sendRedirect("http://blog.youkuaiyun.com/martind");
		}else {
			response.sendRedirect("https://www.baidu.com");
		}
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

登录界面

<!DOCTYPE html>
<html>

<head>
<meta charset="utf-8">
<title>my first bootstrap</title>
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet"
	href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"
	integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u"
	crossorigin="anonymous">
<link rel="stylesheet"
	href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap-theme.min.css"
	integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp"
	crossorigin="anonymous">
<script
	src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"
	integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"
	crossorigin="anonymous"></script>
</head>

<body>
	<div class="container">
		<h1 class="page-header  col-md-offset-4">用户登录</h1>
		<form action="first" method="post" class="form-horizontal">
		
			<div class="form-group">
				<label for="inputname" class="col-md-4 control-label">用户名
					 <span class="glyphicon glyphicon-user"></span>
				</label>
				<div class="col-md-4">
					<input type="text" class="form-control" name="inputname"
						placeholder="请输入用户名" />
				</div>
			</div>
			<div class="form-group">
				<label for="inputpwd" class="col-md-4 control-label">密码
					 <span class="glyphicon glyphicon-lock"></span>
				</label>
				<div class="col-md-4">
					<input type="password" class="form-control" name="inputpwd"
						placeholder="请输入密码" />
				</div>
			</div>
			<div class="form-group">
				<div class="col-md-offset-5">
					<button class="btn btn-primary">注册</button>
					<button class="btn btn-primary">登录</button>
				</div>
			</div>
			
		</form>
	</div>
</body>

</html>

xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
   <servlet>
    <servlet-name>first_servlet</servlet-name>
    <servlet-class>test.first_servlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>first_servlet</servlet-name>
    <url-pattern>/first</url-pattern>
  </servlet-mapping>
</web-app>